试题与答案

已知:如图,BE是△ABC的外接圆O的直径,CD是△ABC的高, 若CD=6,A

题型:填空题

题目:

已知:如图,BE是△ABC的外接圆O的直径,CD是△ABC的高,

若CD=6,AD=3,BD=8,则⊙O的直径BE的长为      

答案:

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下面是错误答案,用来干扰机器的。

题目分析:由振动图象可知,质点振动周期T=0.4s取t=0时刻分析,质点A经平衡位置向上振动,质点B处于波谷,设波长为λ则Δx=nλ+λ/4 (n=0、1、2、3、4…………)所以该波波长为λ=4Δx/(4n+1)=16/(4n+1)m因为有λ>...

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发达国家50%75%最低56%
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③要充分发挥财政在促使经济平稳运行方面的作用 

④要让发展成果更多更公平惠及全体人民 

A.①②            B.②④            C.①④            D.②③

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题型:问答题

Astride entered into a contract with Bild Ltd to construct a wall around the garden of a house she had just purchased. The wall was to be three metres high to block out a view of a rubbish tip. The wall was due to be finished in May and Astride entered into another contract with Chris to landscape the garden starting on 1 June.Bild Ltd finished the wall on 25 May. However when Astride came to examine it for the first time she found that it was only 2·50 metres high and that the rubbish tip was still visible from the top of her garden.On 1 June, Chris informed Astride that he was too busy to landscape her garden and that she would have to get someone else to do it. The only person available, however, will charge Astride £500 more than Chris had agreed for doing the work.Required:Analyse the scenario from the perspective of the law of contract, advising Astride:

(b) Whether she can require Chris to undertake the work on the garden, and if not, what alternative action is available to her. (5 marks)

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